Overview
The ZF 0634.309.077 SHAFT SEAL is a critical OEM genuine component engineered for the WG180, WG200, WG201, and WG65 series transmissions. This precision seal is installed at the output shaft interface, where it prevents transmission fluid from escaping while blocking contaminants from entering the gearbox. The SKU 0634.309.077 is manufactured to ZF’s exacting tolerances, ensuring a tight, durable seal that maintains hydraulic pressure and lubricant integrity. It sits directly within the 4616101101: TRANSMISSION HOUSING, forming a barrier between the rotating shaft and the stationary housing bore.
Symptoms of Failure
When the 0634.309.077 shaft seal degrades, operators will notice distinct performance issues. Look for these specific failure symptoms to diagnose a worn seal:
- Oil leaks at the output flange: The most common sign is a steady drip or wet residue around the transmission output shaft area, often visible on the ground beneath the vehicle.
- Low transmission fluid levels: Gradual fluid loss from a failing seal can trigger low-pressure warnings or erratic shifting behavior.
- Contaminated lubricant: A compromised seal allows dirt and moisture to enter, turning the fluid dark or milky and accelerating internal wear.
- Whining or grinding noises: As the seal hardens or cracks, it may create friction against the shaft, producing audible sounds during operation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0634.309.077 |
| Inner Diameter | 65 mm (estimated) |
| Outer Diameter | 90 mm (estimated) |
| Width / Thickness | 12 mm (estimated) |
| Material | Nitrile rubber (NBR) with steel reinforcement |
| Weight | 0.08 kg (estimated) |
| OEM Reference | ZF 0634.309.077 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This shaft seal is specifically designed for the following ZF transmission models:
- WG 180 Series – All variants requiring output shaft sealing.
- WG 200 Series – Standard fitment for WG200 gearboxes.
- WG 201 Series – Compatible with WG201 units, including high-torque configurations.
- WG 65 Series – Also applicable to WG65 transmissions where the same seal profile is used.
During installation, this seal works in conjunction with the 0636011118: HEXAGON SCREW to secure the housing cover, and it interfaces with the 4616301304: HOUSING or the 4616301309: HOUSING depending on your specific transmission variant. Always verify your housing part number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101101 | TRANSMISSION HOUSING | Main structural casing that houses the shaft seal |
| 0636011118 | HEXAGON SCREW | Fastener for securing housing components |
| 4616301304 | HOUSING | Intermediate housing section for output shaft |
| 4616301309 | HOUSING | Alternate housing variant for WG series |
| 0630361069 | SEALING CAP | Protective cap for unused ports or shafts |
| 0636011038 | HEXAGON SCREW | Additional fastener for cover plates |
| 0636016015 | HEXAGON SCREW | High-strength screw for critical joints |
| 0631306085 | CYLINDRICAL PIN | Alignment pin for precise housing assembly |
| 0634313118 | O-RING | Static seal for fluid-tight connections |
| 0636304019 | SCREW PLUG | Threaded plug for drain or inspection holes |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
